Lamp.



G. K. MALTBY.

LAMP.

APPLICATloN FILED FEB.16.1916.

1,224,189. Y* Patented May 1, 1917.

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@513 d HO'LMMJ www GEORGE K. MALTBY, F NEW YORK, N. Y.

LAMP.

Specification of Letters Patent.

Patented May 1, 1917.

Application filed February l16, 1916. Serial No. 78,584.

To all whom t may concern:

Be it known that I, GEORGE K. MAL'rBr,

a citizen of the United States, residing 1n the city, county, and State of New York,

l.have invented certain .new and useful Improvements in Lamps, of which the following is a full and complete disclosure.

My invention relates to an electric lamp, particularly adapted for use in factor1es, shops, laboratories, etc., where numbers of operators and machines are employed, and where there is a demand for an intense or strong light concentrated on a number of diEerent pieces of work or points.

' The object of my invention is to provide a lamp for use in such places, which shall be simple and durable, and which will distribute light from a common source to a number of dierent points* and will project the light rays in a downwardly direction and` confine them to the particular places where they are desired, so as not to taxthe eyes of the operators by light rays projected directly from the source to the eyes.

My invention will be readily understood from a description of the preferred embodiment, shown in the drawing accompanying and forming a part of this specification.

In this drawing: A Figure 1 is a side elevation of the complete lamp;

Fig. 2 is a horizontal section, taken on the line 2-2 of Fig. 1;

Fig. 3 is a vertical section, taken on the line -3-3 of Fig. 2; and c l Figs. 4, 5 and 6 are d etail views, showing the means for securing the reflecting tubes to the 4light chamber. u

Referring in detail to. these drawings, L designates a base for supportmg the lamp, provided with a vertical hollow shaft F, in which the-supporting rod E is adapted to slide. The rod E may be secured 1n any positionby the set screw. G. A light chamber,'f'ormed of thewall sections A1, A2, A3 and A4 is mounted at the top of the rodE and contains a source'of light in the "form of an electric lamp D. The wall sections, at their side edges overlap each other, and are adjustablehorizontally by means which I will now describe. i

These sections are provided at their bot-4 tom with horizontal slots J1 and at or near their top with horizontal slots J. At their bottom, they are secured to the circular flange M by pins N fixed to the flange M,

and by nuts O mounted on the pins. Likewise, at or near their upper edge they rare secured t'o the annular flange M1 by pins N1, which pass through the slots J and J1 and bly nuts O1. Since the slots J and J1 are e ongated, by loosening the nuts O and O1, ,the wall sections may be adjusted horizontally, so as to alter the relative positions of .the reflecting tubes B. One of .these tubes B is secured to each section and opens into the light chamber at or adjacent the lamp D.

Inl practice, the tubes B as well as the light chamber may be lined with polished metal, glass, or in any suitable way to reflect light from the lamp D. These reflecting tubes will vary in length, depending upon the particular use to which the device is put. vThey serve to concentrate the light rays from the single lamp'D at a plurality of points and project the light downwardly on the work, so as to minimize the strain on the operators eyes. Incase a general illumination of the building where the lamp is employed is desired, cap C, which is supported by a plurality of rods H, hinged to the cap and supported at their lower-ends in sockets, should be raised and supported in the position shown in the drawings. In case no light is desired except that through the reflecting tubes B, by removing the supports H from the sockets, the cap can be lowered and seated directly on the light chamber, so as to cut on all escape of light except through the tubes B.

The lamp described has four reflecting tubes, disposed 90 degrees apart around the light chamber, and is particularly adapted to illuminate four different pieces of work, as sewing machines, for example, when they are arranged in double rows on both sides of a table and equal distances from each other. In case the arrangement of machines is not entirely uniform, the device may still be used by raising' or lowering the light chamber and tubes, and if necessary, by adjusting individual tubes in a horizontal direction, so as to concentrate the light from the different tubes directly on the several pieces of Work. It is obvious that the number of reflecting tubes on each lamp and their relative location aroundlhc light chamber can be varied to suit particular conditions. What I claim as my invention is: l. In a device of the kind described, a vertical standiard comprising a base and constituting a Support, a light chamber mounted thereon and supported 1n. anelefm vated position thereby,a soureof light in@ said chamben'a plurality of d'wniifardljinclined reflecting tubes opening into sai'diff lehamberand so disposed. as to eoncentratei, and Afdireot thelli'ghtg onf;v a; I )luralityroffpoints around 'the' base of the support.

2. In a device of the"kind",deseiibedf light chamber, a soureofylight thereinha fortlie purpose'de'seribe lv y Y y y "'fofthe ki'ndfdesoribedfa l. pl'liifv'a'lit'jf` reflector',tubes'l'opening light ehamljer'anda relectorffeover forsaid Chamber? adjustable yas 't'oV height;y "substanmayas,described." :4. eine device ofthe 'kinadgslribea agir.,- Cillarl l light (ihalnber "having its 'side' Walls formedof' a pluralityfof segnients adjustable horizontal] yf )Vith respeet 'to 'thef li ght chainisupport. arranged support the cha- Inber ahoxethegpwork to be illuminated, a

plurality of downwardly inclined tubes dis- .fposed around and opening into said cham- .ber and arranged to concentrate the light fraysgtherefromon and to illuminate vyaL-plurality :of separate pieces of Work disposed below' said lightharnben f 6- In a device of Ab1ie. l i.11de 1e$1ib-ed,1., light lehamloer, a soiiifeej of.,V therein, 'a' Peinet'sppnbthe I w e'W0f1'to be'illuniinateda plurality. off edownwardly*inclined reflectms h'ambef' and, lighmys h speci'ation in the preisen@ Qf Ltwo,sabsiab- 

